Health department epidemiologist Dr. Zack Moore says the state is working with local health departments to try to stop the spread of the illness.

Moore says many of this year's outbreaks have occurred in homes for the elderly. He says the virus most often is spread through person-to-person contact, contaminated surfaces and contaminated food and water. Moore says hand-washing is the best way to combat the problem.

The new strain is called Sydney 2012 because it is thought to have started in Australia.

Hillary Clinton's office said "nothing nefarious was at play" when the former secretary of state used her personal email address, rather than one provided by the State Department, during her four years as America's top diplomat.